diff --git a/src/CallerApiManager/api_manager.py b/src/CallerApiManager/api_manager.py
index 88da8e9..b0f1093 100644
--- a/src/CallerApiManager/api_manager.py
+++ b/src/CallerApiManager/api_manager.py
@@ -68,7 +68,7 @@ class CallerManagerClient:
         return Call(**response)
 
     async def update_call(self, call_id: int, call: CallIn) -> Call:
-        response = await self._request('PATCH', f'/calls/{call_id}', json=call.model_dump(exclude_none=True))
+        response = await self._request('PATCH', f'/calls/{call_id}', json=call.model_dump(exclude_unset=True))
         return Call(**response)
     
     async def get_call_dialog(self, call_id: int) -> CallDialog: